WO1997016283A1

WO1997016283A1 - Grinder

Info

Publication number: WO1997016283A1
Application number: PCT/JP1996/002882
Authority: WO
Inventors: Tadashi Taninaga; Tatsushi Ito; Masakazu Kozono
Original assignee: Komatsu Ltd.
Priority date: 1995-11-02
Filing date: 1996-10-02
Publication date: 1997-05-09
Also published as: JPH09123060A; GB9805458D0; GB2321028A; DE19681380T1

Abstract

A grinder is supported by a main body frame in such a manner as to be capable of moving up and down, and press force of a rotary grindstone of this grinder to a work W is regulated by an air cylinder and a pressure regulating valve. A hood is supported on the main body frame through a coil spring in such a manner as to cover this rotary grindstone, and the lower surface of the hood is always kept in close contact with the surface of the work W during grinding so as to recover the chips generated during grinding by a dust collector. A brush equipped with a hood is independently supported at the back of the grinder and fine chips adhering to the surface of the work W due to oil, etc., is removed and recovered by a dust collector. This simple construction can prevent scatter of the chips occurring during grinding and can reliably remove the chips.

Description

Description Grinding equipment Technical field

The present invention relates to a grinding apparatus, and more particularly, to a grinding apparatus used for grinding or finishing a back plate or a strain on a thin sheet metal. Background art

When performing a grinding operation using this type of grinding device, chips are generated, and these chips reduce the grinding efficiency and the working environment. This is necessary. In particular, in processes where fine chips are a problem, such as pressing, it is essential to remove chips. Further, in the case of thin sheet metal materials, oil often adheres to the surface of the work, so that it is difficult to remove these chips with a simple air blower.

Conventionally, a so-called wet processing method has been used as a processing method for cutting chips during grinding, in which a machine tool or the like is provided with a cover over the entire apparatus and lubricated with a liquid such as ice or oil. Generally known. On the other hand, a grinding device that grinds by holding a grinding tool such as a grinder cannot perform chip processing as in this machine tool, and therefore, in a subsequent process after the grinding operation is completed. A method is used in which the entire polishing target is cleaned using a special cleaning machine.

On the other hand, as a hand tool, for example, as disclosed in Japanese Patent Application Laid-Open No. 47-31278, a cover and a dust suction device are attached to the grinder. I tried to suck in the chips It is known.

However, as described above, the method of cleaning using a dedicated cleaning machine in the subsequent process requires a cleaning machine that can enter the entire grinding target even if the grinding range, in other words, the generation range of cutting chips is narrow, and the processing efficiency is increased. However, there is a problem that the cost is high and the cost is unavoidable.

Further, as disclosed in the above-mentioned publication, the method of attaching a cover and a dust collector to a grinder and sucking the swarf does not sufficiently prevent the swarf from scattering, and ensures that the swarf is sucked. There is a problem that cannot be done.

The present invention aims at solving the above-mentioned problems and, by using a simple configuration, prevents the swarf generated at the time of grinding from being scattered and reliably removes the swarf. An object of the present invention is to provide a grinding device capable of performing such operations. Disclosure of the invention

In order to achieve the above object, a grinding device according to the present invention includes a grinding tool supported on a main body frame, a hood with an exhaust port provided to cover a rotating tool portion of the grinding tool, and A grinding device comprising: a dust suction device connected to an outlet of a hood;

The hood is supported on the main body frame via elastic supporting means independently of the grinding tool. In the present invention, the hood provided so as to cover the rotating tool portion of the grinding tool is supported on the main body frame via elastic support means independently of the grinding tool. With this grinding tool, the workpiece surface can be ground while the tool is kept in close contact with the workpiece surface to be ground. Therefore, this hood prevents the swarf generated during grinding from scattering, and The swarf collected in the gutter is surely sucked by the dust collector through the exhaust port. In the present invention, since the hood and the grinding tool are independently supported, the reaction force received from the work of the hood does not affect the grinding of the grinding tool.

In the present invention, it is preferable that the grinding tool is supported by the main body frame via a pressing force adjusting means for adjusting a pressing force against a surface of a workpiece to be ground. By doing so, the pressing force of the grinding tool against the workpiece surface can always be adjusted to an appropriate value, and the grinding operation can be performed stably.

Further, it is preferable that the grinding tool is constituted by a grinder having a disk-shaped grindstone, and the grindstone plate surface of the grinder is supported so as to rise forward with respect to the grinding surface. In this way, it is possible to effectively perform the grinding by the rear portion of the rotating disk-shaped grinding wheel while removing the cutting chips.

Further, it is preferable that a dust collection chamber having a substantially rectangular cross section in a direction along the surface of the grindstone plate of the grinder is provided in the hood. When a dust collection chamber having a substantially square cross section is provided in this way, chips generated by grinding can be made to collide with the side walls of the dust collection chamber once, absorb kinetic energy, and then be guided to the exhaust port. Chips can be sucked more effectively.

Further, it is preferable that the dust collection chamber has a substantially mating shape in which a cross section in a direction perpendicular to the surface of the grindstone plate is divergent toward the front. With this configuration, the work surface can be reliably ground by the rear portion of the grindstone plate surface.

In the present invention, it is preferable to provide a brush nit for cleaning the surface of the work after grinding by the grinding tool, further behind the grinding tool in the grinding direction. In this case, this bra schnit It is preferable that the main body frame is supported independently of the grinding tool via elastic supporting means. By doing so, the brush knit can follow the workpiece surface independently of the grinding tool, and the effect of removing cutting chips can be further ensured.

The brush nit includes a substantially cylindrical brush that is rotated around a horizontal axis perpendicular to the grinding direction, and a hood with an exhaust port provided to cover the brush. It is preferable to connect the dust collector to the outlet of the hood. In this case, it is preferable that the hood is supported by pins on a support frame that supports the brush, and is provided so as to swing back and forth in the grinding direction. Further, it is preferable to provide a seal member at a lower end portion of the hood for bringing the lower surface of the hood into close contact with the work surface. By providing such a brush nit, it is possible to remove the fine cutting powder adhering to the workpiece surface with oil etc. that could not be completely removed during grinding with the substantially cylindrical brush. However, it is possible to almost completely remove chips.

In the present invention, the main body frame that supports the grinding tool may be supported by an arm of a mouth-bot, or may be supported by a cart that travels along a surface of a workpiece to be ground. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a side view of a grinding device according to one embodiment of the present invention,

FIG. 2 is a plan view of a grinding device according to one embodiment of the present invention,

FIG. 3 is a rear view of the grinding device according to one embodiment of the present invention,

Fig. 4 is a diagram showing the detailed structure of the hood, where (a) is a plan view, (b) is a BB cross-sectional view of (a), and (c) is a C-C cross-sectional view of (a). FIG. 5 is a perspective view of the brush. BEST MODE FOR CARRYING OUT THE INVENTION

Next, a specific embodiment of the grinding apparatus according to the present invention will be described with reference to the drawings.

FIG. 1 is a side view, FIG. 2 is a plan view, and FIG. 3 is a rear view (partially cut away) of a grinding apparatus according to an embodiment of the present invention.

In the grinding apparatus 1 of the present embodiment, the main body frame (holder) 2 is strong, and is provided with a dolly that travels in the direction of arrow A (see FIG. 1) along the surface of the robot arm or the workpiece W (not shown). It is supported so as to be slightly inclined backward with respect to the vertical axis via the mounting plate 3. A slide plate 4 slidable up and down along the body frame 2 is provided on a front surface of the body frame 2, and a slider 6 is mounted on a front surface of the slide plate 4 via a mounting plate 5. Is attached.

The grinder 6 has a disk-shaped rotary grindstone 6a having an axis set so as to be slightly inclined backward with respect to a vertical axis, at a lower rear portion of the grinder body. In this way, the rotating grindstone 6a is tilted and supported such that its grindstone plate surface rises forward with respect to the grinding surface of the peak W, and the grinding surface is ground by the rear portion of the grindstone plate surface. Is to be done.

An air cylinder 7 made of a bellows cylinder is attached to the front of the main body frame 2, and a tip of a cylinder opening 7 a of the air cylinder 7 is attached to the mounting plate 5 via a mounting bracket. It is fixed to the front. A pressure control valve 8 is provided in front of the air cylinder 7 so as to be connected to the cylinder chamber via a pipe. The pressure control valve 8 operates to relieve the air in the cylinder chamber to the atmosphere when the air pressure in the cylinder chamber of the air cylinder 7 exceeds a predetermined pressure. With such a configuration, the pressing force applied from the workpiece W to the rotating grindstone 6 a of the grinder 6 acts as a push-up force on the cylinder rod 7 a via the mounting plate 5, This pushing force is The pressure applied to the work W of the cultivating grindstone 6a is always maintained at a constant value by making an approximation with the indoor air pressure. When the pushing force exceeds a predetermined value, the air pressure in the cylinder chamber is relieved to the atmosphere by the pressure control valve 8, and a pressing force exceeding the predetermined pressure is applied to the rotary grindstone 6a. It has been. Reference numeral 9 in the figure denotes a pressure gauge for visually checking the set pressure (relief pressure) of the pressure control valve 8.

The grindstone 6a of the grinder 6 is covered with a hood 10 for preventing scattering of cuttings. The hood 10 is suspended from a support 11 suspended by the main body frame 2 via four suspension rods 12. The hood 10 can be moved up and down with respect to the support 11 by supporting each of the hanging rods 12 so as to be vertically slidable on the support 11. However, the coil spring 13 wound around the suspension rod 12 is constantly urged downward so as to follow the workpiece W surface. In a state where the grinding operation is not performed, in other words, when no external force is applied to the hood 10 from the work W side, the lower surface of the hood 10 is positioned lower than the lower end of the rotary grindstone 6a (see FIG. 1). (Position shown in the figure).

The detailed structure of this hood 10 is shown in FIG. As is apparent from FIG. 4, the hood 10 has a substantially square shape in a plan view, and has a through hole 10a for passing a part of the ground 6 in the center. At the same time, an exhaust port 10b is formed on the front side in the grinding direction. Here, a suction pipe (ejector 1) 14 connected to a dust suction device (not shown) is connected to the exhaust port 10b. In addition, the hood 10 has a side surface that is inclined so that the front portion is high and the rear portion is low, so that the lower surface is always in close contact with the surface of the workpiece W. It has a dust collection chamber 10d whose cross section in the direction along the plate surface is substantially square (may be rectangular). Note that this embodiment In this case, an air jet unit 15 is provided in front of the hood 10. The air jet unit 15 jets air from the jet port 15a formed in the front toward the surface of the work W obliquely downward and forward, thereby removing oil adhering to the surface of the work W. Plays the role of blowing o

In the present embodiment, as described above, the hood 10 is elastically supported by the main body frame 2 via the coil spring 13 and is supported independently of the grounder 6, so that FIG. As shown, when the lower surface of the hood 10 is brought into close contact with the surface of the work W, and the main frame 2 is moved downward while the rotary grindstone 6a is floating from the surface of the work W, this hood 10 The rotating wheel 6a can be moved down while the workpiece W surface is constantly brought into close contact with the surface of the workpiece W, and the surface of the workpiece W can be ground by the rotating wheel 6a. In addition, since the pressing force of the grinder 6 is set by the air cylinder 7, the pressure of the air cylinder 7 is switched to a value high enough to raise only the grinder 6 at the end of the grinding, so that the grinding is performed. After the grinding, the swarf accumulated in the hood 10 can be sucked up by the suction pipe】 4, and the swarf can be prevented from being scattered when the body frame 2 is pulled up at the end of the grinding. It can be. In this way, the swarf generated during grinding can be reliably taken in by the hood 10, and the swarf can be reliably prevented from being scattered outside the hood 10.

At this time, the swarf generated by the rotary grinding of the rotary grinding wheel 6a once collides with the side wall of the dust collecting chamber 10d having a substantially square cross section, and is introduced into the exhaust port 10b after kinetic energy is absorbed. Then, through the exhaust port 10b and the suction pipe 14, suction is surely performed by the dust suction device.

Next, the brush nit 16 provided on the rear side of the grinder 6 in the grinding direction will be described.

A slide guide 17 is attached to the rear of the body frame 2, A brush nit 16 is provided along the slide guide 17 so as to be slidable up and down. The brush nit 16 is shown in FIG. 1 via a support frame 18, a motor 19 attached to the support frame 18, and a gear transmission mechanism 20 driven by the motor 19. It is provided with a cylindrical brush 21 (see FIG. 5) that is rotated in the direction of arrow D, and a hood 22 that is attached to the support frame 18 so as to cover the brush 21. ing.

An arm plate 23 is fixed to the right side of the support frame 18 so as to project toward the side of the main body frame 2. The arm plate 23 is elastically supported by the main frame 2 via a coil spring 24 inserted into the main frame 2. In this way, when the brush 21 receives a pressing force from the surface of the peak W, the coil spring 24 absorbs the pressing force.

The hood 22 has a substantially semi-cylindrical shape with an opening at the bottom, and is pin-supported on the support frame 18 at both sides of the center position, and is provided with left and right 2 provided on the support frame 18 side. By engaging a total of four pins 25 and the long holes 26 provided on the side of the hood 22 corresponding to the pins 25, the pins 25 can swing back and forth within a predetermined angle range. I have. When the hood 22 is swung forward beyond a predetermined angle, the stopper 27 attached to the front of the hood 22 is moved upward by the top surface of the hood 10 on the ground 6 side. Is regulated by contact with

An exhaust port 28 is provided at the front of the hood 22, and the exhaust port 28 is connected to a suction device common to the suction tube 14 on the ground 6 through a suction tube 29. ing. A seal member 30 is attached to the lower end of the hood 22 over the entire circumference, and the seal member 30 tightly contacts the lower end of the hood 2 ′ 2 and the surface of the workpiece W. Is ensured. In the grinding device 1 configured as described above, the mounting plate 3, in other words, the rotating grindstone 6 a of the grinder 6 is moved downward to be inclined and supported with respect to the surface of the work W. The surface of the work W is ground by the rear part of the rotary grindstone 6a. During this grinding, the hood 10 is relatively moved upward against the urging force of the coil spring 13, whereby the lower surface of the hood 10 is always in close contact with the surface of the workpiece W and grinding is performed. Will be Therefore, relatively large chips generated during grinding are collected in the dust collecting chamber 10 of the hood 10 and reliably sucked by the dust suction device through the exhaust port 1 Qb and the suction pipe 14. . In addition, since the pressing force of the grinder 6 is set by the air cylinder 7, the pressure of the air cylinder 7 is switched to be high enough to pull up only the grinder 6 at the end of grinding, so that after grinding, Chips accumulated in the hood 10 can be sucked up by the suction pipe 14 to prevent scattering of chips when the main frame 2 is pulled up at the end of grinding. In addition, chips that could not be completely sucked by the hood 10, for example, fine chips adhering to the surface of the work W with oil or the like, are passed through the grinding point 16 by the brush nit 16. As a result, the swarf is completely removed by the rotating brush 21, and the removed chips are taken into the hood 22 covering the brush 21, and the exhaust port 28 and Via suction tube 2 9 Is sucked into the dust collector. At this time, the support frame 18 supporting the brush 21 is elastically supported by the coil frame 24 with respect to the main frame 2, and the hood 22 is moved forward and backward with respect to the support frame 18. The brush 21 is supported so as to be able to swing in the direction, so that the brush 21 can follow the surface of the workpiece W independently of the grinder 6 and covers the brush 21 Chips are removed while the lower surface of the hood 22 is always in close contact with the surface of the work W.

As described above, the grinding device 1 of this embodiment uses the mounting plate 3 for the robot key. The desired work w can be ground by moving the arm supported by the arm. In addition, by supporting the mounting plate 3 on a joint vehicle or a traveling head that travels along the guide rail, it is possible to grind the work W that is settled below the guide rail. . In this case, if the guide rail is supported so as to be movable in a direction orthogonal to the longitudinal direction, the grinder 6 can be freely positioned in the X-axis direction and the y-axis direction along the surface of the plate-shaped work W. It is suitable because it is possible.

Claims

The scope of the claims

A grinding tool provided with a grinding tool supported by the main body frame, a hood with an exhaust port provided to extend the rotating tool part of the grinding tool, and a dust suction device connected to the exhaust port of the hood Device

The grinding and concealing device, wherein the hood is supported on the main body frame via elastic supporting means independently of the grinding tool.

2. The grinding apparatus according to claim 1, wherein the grinding tool is supported by the main body frame via a pressing force adjusting means for adjusting a pressing force against a surface of a workpiece to be ground.

The grinding tool is constituted by a grinder having a disc-shaped grindstone, and the grindstone plate surface of the grinder is supported so as to rise forward with respect to the grinding surface. The polishing apparatus according to 1.

4. The grinding apparatus according to claim 3, wherein a dust collection chamber having a substantially rectangular cross section in a direction along a surface of the grindstone plate of the grinder is provided in the hood.

5. The grinding apparatus according to claim 4, wherein the dust collection chamber has a substantially mating shape in which a cross section in a direction perpendicular to a surface of the grinding stone plate is divergent toward the front.

Further, a brush unit for cleaning a work surface after grinding by the grinding tool is provided at a rear side in a grinding direction of the grinding tool, wherein a brush unit is provided. The grinding device according to any one of the above.

The brush nit is supported independently of the grinding tool via an elastic support means with respect to the body frame. The grinding device according to claim 6, wherein

The brush schnit includes a substantially cylindrical brush rotated around a horizontal axis perpendicular to a grinding direction, and a hood with an exhaust port provided to extend the brush. The grinding device according to claim 6, wherein the dust suction device is connected to an exhaust port of a hood.

9. The grinding apparatus according to claim 8, wherein the hood is supported by pins on a support frame that supports the brush, and is provided so as to swing back and forth in a grinding direction.

The grinding device according to claim 8, wherein a seal member is provided at a lower end portion of the hood so that a lower surface of the hood is in close contact with the surface of the work.

The grinding device according to claim 1, wherein the main body frame is supported by a robot arm.

The polishing apparatus according to claim 1, wherein the main body frame is supported by a joint vehicle running along a surface of a workpiece to be ground.